MULLARD ECC81 / 12AT7 — Vintage Great Britain Matched Pair
Grade: Gold Series
Laboratory Verified
Made in Great Britain
Laboratory Verified
Made in Great Britain
Top Square Getter
BVA Mullard Shield Logo
Dual Triode 12AT7 / ECC81
Amplitrex AT1000 Verified
BVA Mullard Shield Logo
Dual Triode 12AT7 / ECC81
Amplitrex AT1000 Verified
Up for sale is a professional-grade matched pair (2 pieces) of authentic Mullard ECC81 / 12AT7 vacuum tubes, manufactured in Great Britain. These sought-after valves feature the rare Top Square Getter and carry the classic Mullard BVA shield logo.
Testing has been completed on the precision Amplitrex AT1000 digital analyzer. Famous for their exceptional harmonic richness and musical warmth, these British-made Mullards are perfect for high-fidelity preamplification or guitar amp driver stages.
| Serial No. | Triode Section | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| #3421001 | Section 1 (T1) | 10.0 | 9.0 | 90% | 5500 | 4980 | 90.5% |
| Section 2 (T2) | 10.0 | 8.6 | 86% | 5500 | 5040 | 91.6% | |
| #3421002 | Section 1 (T1) | 10.0 | 8.4 | 84% | 5500 | 5100 | 92.7% |
| Section 2 (T2) | 10.0 | 9.8 | 98% | 5500 | 5300 | 96.4% |
Technical Note: Percentage calculations are based on standard factory specifications for the ECC81 family (Ip = 10.0mA, Gm = 5,500 uMhos).
Matched Metrics: Balanced Gain (Mu) and Plate Resistance (RP) verified on Amplitrex AT1000.
Email: [email protected]
Precision Verified — NOS Audio Tubes
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